GLUBEGINCURVE() GLUBEGINCURVE() NAME gluBeginCurve, gluEndCurve - delimit a NURBS curve definition C SPECIFICATION void gluBeginCurve( GLUnurbs* nurb ) void gluEndCurve( GLUnurbs* nurb ) delim $$ PARAMETERS nurb Specifies the NURBS object (created with gluNewNurbsRenderer). DESCRIPTION Use gluBeginCurve to mark the beginning of a NURBS curve definition. After calling gluBeginCurve, make one or more calls to gluNurbsCurve to define the attributes of the curve. Exactly one of the calls to gluNurbsCurve must have a curve type of GL_MAP1_VERTEX_3 or GL_MAP1_VERTEX_4. To mark the end of the NURBS curve definition, call gluEndCurve. GL evaluators are used to render the NURBS curve as a series of line seg- ments. Evaluator state is preserved during rendering with glPushAt- trib(GL_EVAL_BIT) and glPopAttrib(). See the glPushAttrib reference page for details on exactly what state these calls preserve. EXAMPLE The following commands render a textured NURBS curve with normals; texture coordinates and normals are also specified as NURBS curves: gluBeginCurve(nobj); gluNurbsCurve(nobj, ..., GL_MAP1_TEXTURE_COORD_2); gluNurbsCurve(nobj, ..., GL_MAP1_NORMAL); gluNurbsCurve(nobj, ..., GL_MAP1_VERTEX_4); gluEndCurve(nobj); SEE ALSO gluBeginSurface, gluBeginTrim, gluNewNurbsRenderer, gluNurbsCurve, glPopAt- trib, glPushAttrib GLUBEGINCURVE()
NAME | C SPECIFICATION | PARAMETERS | DESCRIPTION | EXAMPLE | SEE ALSO
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